bridge(s): A link or connection between two objects - usually places either side of an obstacle, such as a river, chasm, or estuary.dge:
Types of Bridges
What are the benefits of bridges?
Some of the benefits of bridges are obvious: supplies of food and traded goods can get across an obstacle or through difficult terrain in a shorter time.
The materials used to make bridges are:
Wood, stone, brick, cast iron, wrought iron, steel, concrete, aluminum, and others. The most important material is stone.
Bridge construction technology , steel bridges were riveted together, not bolted, concrete bridges were cast in place, not precast; and large bridge members were built from lacing bars and smaller sections, not rolled in one piece.
A link or connection between two objects - usually places either side of an obstacle, such as a river, chasm, or estuary.dge:
Types of Bridges
What are the benefits of bridges?
Some of the benefits of bridges are obvious: supplies of food and traded goods can get across an obstacle or through difficult terrain in a shorter time.The materials used to make bridges are:
Wood, stone, brick, cast iron, wrought iron, steel, concrete, aluminum, and others. The most important material is stone.Bridge construction technology , steel bridges were riveted together, not bolted, concrete bridges were cast in place, not precast; and large bridge members were built from lacing bars and smaller sections, not rolled in one piece.
http://en.structurae.de/structures/stype/index.cfm?id=1